Cutter-head.



PATBNTED AUG. 4, 190s. C. NsoN.

0U HEAD.

TION FILED APB.. 27,1908.

iniTENTV OFFICE.

oHARLEsJOHNsON, OF NEW LONDON, WISCONSIN.

CUTTER-HEAD.

To all whom it may concern: yBe it known that I, CHARLES JOHNSON, a citizen of the United States, residing at New London, in the county of Outagamie and State of Wisconsin, have invented a new and useful Cutter-Head, of which the following is a specification.

My invention relates to an' improvement' in the construction of a cutter head for which an application was filed by me February 13, 1908, Serial No. 415,713, for Letters Patenty of the United States, and it consists'of the form of the bar of metal from which the cutter head is made, 4and also, `in the manner of applying chip breakers to the 'cutter head and to the method by which the chip breakers can be made, said chipbreakers being made separable from the cutter head and secured' thereto with screws, and thereby effecting a great saving in the weight of material and of labor. in forming both the shaft and chip breakers, the improvement being shown in the accompanying drawing, in which,-.

Figure 1 is a side elevation of a cutter head made according to my improvement. Fig. 2v is an end view Of the left hand end of Fig'. 1. Fig. 3 is a plan of a knife used', in the cutter head. Fig. 4 is a transverse section of the cutter head upon the line a, a, of Fig. 1. Fig/ 5 is an end view ofthe right hand end'of'Fig.

1. Fig. 6 is'an edge view of a circular disk from which the chipbreakers can be formed.

Similar numerals indicate like-parts in the 4several views. ,y

` 1, indicates the "cutter head shaft"`turned up for the head andfor the bearings 2. After being turned u it is to vbe securedin a suitable holder, andv nife seats 3', 4, 5, 6 and 7, formed in airs upon opposite sides. of the shaft, they being arranged in a diagonal direction across the :shaft 4and helically around it with va short space lcircumferentially of the cutter head, between the cutting points of adjoining knives, whereby, .the

,timeduring which the knives are engaged in cutting during one revolution is divided into as many parts as there are knives, the numf l. ber of knives beinggoverned by the -use to which the cutter headis to be put. After forming the knife seats, the shaft is sub' jected to the action of a cutting tool for forming chip breaker seats 8, which seats are cut at one of the edges of the knife seats and are in the form of a segment of a circle, they being a little less .than a half circle, and of a de th Which is desired for the thickness of the c ip 1'Speciicatiozi of Letters latent. Application filed April 27, 1908. Serial No. 429,560.

rammed Aug. 4, 1908.

Hthe afore-mentioned holder for the formation of knife and chip breaker seats, its bolt hole 9 for receivin a knife securing bolt may be bored, and a so, holes for receiving fastening screws 10, for holding the chip' breaker to its seat. l

The chip breakers 11 consist of circular segments, and may be formed by first making a circular disk of the proper diameter as is shown `in Fig. 6, and making-a cut 12, diagonallyA across it and thereby making two chip breakers from one disk. Each one is to be yd rilledand countersunk` for receiving flat headed screws, and the chip breakers can be prepared according to a standard pattern in quantities any time previousto their use.

The chip breaking edge 13, of vthe chip knife seats and be upon such 'a .curve as will breakers. While the cutter lhead -is within correspond with -the curve which -the knife cutting edges are required to have in order to cut a plain even surface upon the article being planed. -It will be observed that some of the corners of a part of the chipbreakers require to be cut od for fitting some of the knife seats, es ecially, those at the ends of the cutter heacii formed of a suitable meta referably of tool steel, and aftenbeing fitted) to their respective seats, drilled, countersunk and their chip breaking edges finished to the proper form and curve,ithey may be tempered and there- The several knife seats being completed, y

knives '14 may besecured thereto by means of ta bolts 15, having a washer 16, between bolt eadsl and knife.

by add largely to the wearing quality of The chi breakers are to be y ico For assisting in holding the chip breaker in their seats and lessgning the number ot screws for securing them thereln, the circular 4disks from, which the chip breakers are for entering a groove 18, in the curved edge of the chip breaker seat, said tongue bein shown on the edge of the disk in Fig. 6 an the ltongue and -groove'in Fig. .4, but they are not shown in Fi s. l, 2 and 5. The chip formed, may be provided with a tongue-17,4

breakers being a haf circle,l nearlya single l 'l screw will usually be sufficient for holding "the chipbreaker toits seat.

' breaker arranged to Having describedr my invention, what I claim and desire to secure by Letters'Patent, 1s,- v r 1. A cutter head Iformed of a cylindrical shaft, a seat for a, knife formed transversely of the shaft, achip breaker s eat of a circular segmental forni at one of the outer edges of the knife seat, a chip breaker.A fitted to said last namedv seat and one or more screws for'- securing the chip breaker to its seat,

2. A chip breaker for a cutter head, consisting of a semi-circular plate having parallel sides, the straight edge of the semi-circle being beveled atan angle of approximately degrees for forming its'chip breaking edge, the superficial area ef one slde of the plate exceeding, and that of the other vside beingl less, than the halfl of the circle of the kplate from which the chip breaker. is formed.4

. 3. In a cutter head having aknife sea't ar ran ed in a diagonal direction across the cutter ead shaft, a chip breaker seatof a circular segmental form at one .of the outer edges of the knife seat,I a` roove formediin'the circular edge .of the chip breaker seat. a. chip t within said'seat," a tongue upon the circular' outer ed e of the chip breaker ada ted to fit Wit in said groove,with the c ip breaking edgle of the. chi breaker projecting beyond t e outer surlgace of said shaft, and one or more screws for securing the chip breaker to its seat.

4. A cutter head formed of. a cylindrical shaft, a seat for a knife formed transversely of the shaft, a chip breaker seat of a circular segmental form at one'of the outer edges of the knife seat, a chip breaker fitted to the chi breaker seat, one or more screws for securing the chip breaker to its seat, and said chip breaker u on its outer surface'extending outside of t e cylindrical surface of said shaft. i

5. A cutter head formed of a cylindrical shaft, a 'seat for a knife arranged in a diagonal direction transyersely. of the shaft, a chip breaker seat of a circular segmental form at one of the outer edges of the knife seat, a chi i breaker fitted to said chip breaker seat with its chip breaking edge projecting beyond the cylindrical surface of said shaft, and one or more screws for securing the chip breaker to its seat.

6.- A cutter head formed ofa cylindrical shaft, a lurality ofknife seats arranged in a diagonalpdi'recticn around the shaft, a chip breaker seat of a circular segmental forni at one of the outer edges of each knife seat, a chip breaker fitted to each chip breaker seat wi,` its chip breaking edge projecting beond the cylindrical surface of said 'shaft and ying in ahelical line different eircu1nferentially ofthe shaft from the'helical lines of the chipbreaking `edges of the chip breakers of acljoininknifeseats, the chip breaking edge of each 'c ip breaker being of such a curve as will engage with.' aiiat even surface as the cutter headis revolved, and one or more screws for securing each chip breaker to its seat;

7. A cutter head formed'of a cylindrical shaft, a'plurality of knife seats arranged upon opposite sid'es of the shaft in airs, each knife seat having a plain even sul ace adapted for having a cutting knife secured thereto, a chip breaker seat of a circular segmental form at one of Athe Outer edges of each knife.

seat, a chipbreaker of a like circular segmental form fitted to and secured within each chip breaker seat, the chip breaking edge of each air of chip breakers extendinor outside 0ft e cylindrical surface of sai4 shaft'and bein arran ed in helical lines around the axial ine ofit ie cutter headdiil'er- -ent ciicumferentially of'. the lcutter ,headfroin'the helical lines'of thc chip breaking edglcs of an adjoining pair of chip breakers, an

each chip breaker for securing it to its seat.

. CHARLES JOHNSON. Witnesses:I

HANS' P. MADsoN, JNO. RUNNEn. 

